Aon plc (Class A)
Held by 17 tracked managers as of Q2 2026 · CUSIP ⓘCUSIP: A 9-character ID for one specific security - one share class of one company, or one bond. Tickers can change and can mean different things in different countries; a CUSIP always identifies exactly the same security, which is why filings use it. Guide G0403H108 · Sector ⓘGICS sectors: The 11-sector system most investors know (Global Industry Classification Standard): Technology, Health Care, Financials and so on. This site assigns each company a GICS-style sector from its SIC code, with a few hand corrections, so sector pages match the names investors expect. Guide
In plain English: 17 of the investors we track own this stock. In the latest quarter, 6 of them bought more of it and 11 sold some or all of theirs (1 bought it for the first time). That tells you what they did last quarter — not what the stock will do next.
Educational and informational only, not personalized investment advice. Based on public filings that may be delayed or contain errors; verify with the original filings. Disclaimer
Managers holding
17
-2 vs last quarter (like-for-like)
Total value held
$6.33B
Across tracked managers
Average weight ⓘOn average, how big this stock is in the portfolios that own it (its share of each manager's reported portfolio value).
1.0%
Of each manager's book
QoQ value ⓘLike-for-like: only managers that filed both quarters are compared, so a manager filing late (or confidentially) does not look like buying or selling. Includes price changes.
-$155.51M
-2.8% vs last quarter
Net shares bought
-939.1K
Est. net flow -$310.86M
Quarter activity
6 bought · 11 sold
1 new · 3 sold out
Tracked capital in this stock
Total value held (area) and number of managers (line). Dips can mean a large holder filed that quarter confidentially (e.g. Norges Bank in Q1/Q3).
Aggregate buying and selling
Net share change reported each quarter
Who owns AON?
🔒 The 'who added and who trimmed' chart is a Plus feature
You're viewing the Free plan. Upgrade to unlock The 'who added and who trimmed' chart — every paid plan starts with a 7-day free trial, and you can cancel in two clicks.
Who owns AON? — Q2 2026
Holders ranked by position size, with each one's quarter-over-quarter change.
Column filters
| # | Manager | Fund | Shares | Value ↓ | % of their portfolio | QoQ | Δ shares | Δ shares % | Est. Δ value ⓘChange in shares × this quarter's price |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Dodge & Cox | Dodge & Cox | 8.59M | $2.85B | 1.5% | Added | +477.0K | +5.9% | +$158.23M |
| 2 | Norges Bank | Norges Bank Investment Management | 2.80M | $927.66M | 0.1% | — | — | — | — |
| 3 | Boston Partners | Boston Partners Global Investors | 2.09M | $695.75M | 0.6% | Added | +134.7K | +6.9% | +$44.86M |
| 4 | Mawer | Mawer Investment Management | 1.17M | $388.62M | 2.6% | Reduced | -105.5K | -8.3% | -$34.98M |
| 5 | Andreas Halvorsen | Viking Global Investors | 1.15M | $381.86M | 1.1% | Added | +64.2K | +5.9% | +$21.28M |
| 6 | Diamond Hill | Diamond Hill Capital Management | 1.11M | $369.55M | 3.0% | Reduced | -373.7K | -25.1% | -$123.96M |
| 7 | Seth Klarman | The Baupost Group | 687.00K | $227.87M | 4.2% | Reduced | -82.0K | -10.7% | -$27.20M |
| 8 | First Pacific Advisors | First Pacific Advisors, LP | 681.37K | $226.00M | 2.8% | Reduced | -21.9K | -3.1% | -$7.26M |
| 9 | Israel Englander | Millennium Management | 312.20K | $103.55M | 0.1% | Added | +292.2K | +1462.9% | +$96.93M |
| 10 | Polen Capital | Polen Capital Management | 164.03K | $54.41M | 0.5% | Reduced | -1.2M | -87.9% | -$394.72M |
| 11 | Tom Gayner | Markel Group | 135.80K | $45.04M | 0.3% | Held | 0 | 0.0% | $0 |
| 12 | Ken Griffin | Citadel Advisors | 105.57K | $35.02M | 0.0% | Added | +25.3K | +31.5% | +$8.38M |
| 13 | David Shaw | D.E. Shaw & Co. | 34.77K | $11.53M | 0.0% | Reduced | -93.6K | -72.9% | -$31.03M |
| 14 | Ray Dalio | Bridgewater Associates | 15.66K | $5.20M | 0.0% | Reduced | -4.6K | -22.5% | -$1.51M |
| 15 | Donald Yacktman | Yacktman Asset Management | 12.91K | $4.28M | 0.1% | Held | 0 | 0.0% | $0 |
| 16 | Two Sigma | Two Sigma Investments | 6.30K | $2.09M | 0.0% | Reduced | -13.2K | -67.8% | -$4.39M |
| 17 | Ken Fisher | Fisher Asset Management | 2.80K | $927.89K | 0.0% | New | +2.8K | — | +$927.89K |
Column filters
| Manager | Fund | Shares sold | Value last quarter ↓ |
|---|---|---|---|
| Steve Cohen | Point72 Asset Management | -33.3K | $10.75M |
| Jim Simons | Renaissance Technologies | -11.6K | $3.74M |
| Mario Gabelli | GAMCO Investors | -5.9K | $1.92M |
Politician trades
Column filters
| Politician | Date | Ticker | Asset | Type | Reported range ⓘThe dollar range the politician reported. Exact amounts are not disclosed. | Est. size ⓘOur estimate only: the midpoint of the reported range. | Owner | Account ⓘSubholding Of: the account the trade was in, as named on the report (e.g. an IRA or a brokerage account). The same stock bought on the same day in different accounts is a separate trade in each account. | Filed ↑ | Filing delay ⓘDays between the trade and the report. Over 45 days is late under the STOCK Act. | Source |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Michael T. McCaul Politician | Jan 18, 2024 | AON | AON PLC scanned | Purchase | $50,001 - $100,000 | Est. $75,000 (midpoint of reported range $50,001–$100,000) | Spouse | — | Feb 13, 2024 | 26 days | PTR ↗ |
| Michael T. McCaul Politician | Jan 18, 2024 | AON | AON PLC scanned | Purchase | $50,001 - $100,000 | Est. $75,000 (midpoint of reported range $50,001–$100,000) | — | — | Feb 13, 2024 | 26 days | PTR ↗ |
| Michael T. McCaul Politician | May 6, 2024 | AON | AON PLC scanned | Purchase | $15,001 - $50,000 | Est. $32,500 (midpoint of reported range $15,001–$50,000) | Spouse | — | Jun 13, 2024 | 38 days | PTR ↗ |
| Michael T. McCaul Politician | May 6, 2024 | AON | AON PLC scanned | Purchase | $15,001 - $50,000 | Est. $32,500 (midpoint of reported range $15,001–$50,000) | — | — | Jun 13, 2024 | 38 days | PTR ↗ |
| Thomas H. Kean, Jr. Politician | May 6, 2024 | AON | Aon plc Class A Ordinary Shares (AON) [ST] | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | Kean Family Partnership | Jun 18, 2024 | 43 days | PTR ↗ |
| Michael T. McCaul Politician | Nov 19, 2024 | AON | AON PLC scanned | Sale | $50,001 - $100,000 | Est. $75,000 (midpoint of reported range $50,001–$100,000) | — | — | Dec 16, 2024 | 27 days | PTR ↗ |
| Michael T. McCaul Politician | Jan 9, 2025 | AON | AON PLC scanned | Sale | $50,001 - $100,000 | Est. $75,000 (midpoint of reported range $50,001–$100,000) | Spouse | — | Feb 11, 2025 | 33 days | PTR ↗ |
| Jefferson Shreve Politician | Mar 13, 2025 | AON | Aon plc Class A Ordinary Shares (AON) [ST] | Purchase | $15,001 - $50,000 | Est. $32,500 (midpoint of reported range $15,001–$50,000) | Self | CRT - Standard Unit Trust | Apr 11, 2025 | 29 days | PTR ↗ |
| Michael T. McCaul Politician | Mar 26, 2025 | AON | AON PLC scanned | Sale | $15,001 - $50,000 | Est. $32,500 (midpoint of reported range $15,001–$50,000) | Spouse | — | Apr 17, 2025 | 22 days | PTR ↗ |
| Michael T. McCaul Politician | Mar 19, 2025 | AON | AON PLC scanned | Sale | $15,001 - $50,000 | Est. $32,500 (midpoint of reported range $15,001–$50,000) | Spouse | — | Apr 17, 2025 | 29 days | PTR ↗ |
| Michael T. McCaul Politician | Apr 2, 2025 | AON | AON PLC scanned | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | — | — | May 12, 2025 | 40 days | PTR ↗ |
| Michael T. McCaul Politician | Apr 14, 2025 | AON | AON PLC scanned | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | — | May 12, 2025 | 28 days | PTR ↗ |
| Thomas H. Kean, Jr. Politician | May 27, 2025 | AON | Aon plc Class A Ordinary Shares (AON) [ST] | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | Kean Family Partnership | Jun 17, 2025 | 21 days | PTR ↗ |
| Jefferson Shreve Politician | May 8, 2025 | AON | Aon plc Class A Ordinary Shares (AON) [ST] | Sale | $15,001 - $50,000 | Est. $32,500 (midpoint of reported range $15,001–$50,000) | Self | CRT - Standard Unit Trust | Jun 22, 2025 | 45 days | PTR ↗ |
| Michael T. McCaul Politician | Jun 16, 2025 | AON | AON PLC-CLASS A scanned | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | — | Jul 7, 2025 | 21 days | PTR ↗ |